The crankshaft is an important part of the engine and its material is made of carbon structural steel or ductile iron. After the crankshaft is mounted with the connecting rod, the upper and lower (reciprocating) movement of the connecting rod can be changed into a cyclic (rotating) motion, which is the main rotating part of the engine. The rotation of the crankshaft is the power source of the engine, and the whole hardware business information center) Http://news.chinawj.com.cn
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